The government has signalled it is set to take a tougher line against Chinese telecoms equipment-maker Huawei.
A review is under way into how forthcoming US sanctions would affect the UK's continued use of its products.
"Given that these sanctions... are extensive, it is likely to have an impact on the viability of Huawei as a provider for the 5G network," said Digital Secretary Oliver Dowden.
He added he wanted Samsung and NEC to become 5G network kit providers.
They would help make the UK's mobile networks become less dependent on the other two suppliers: Ericsson and Nokia. Mr Dowden said the current situation represented a "market failure".
Defence Secretary Ben Wallace added that the sanctions - which are set to come into effect in September - had specifically been designed to force the UK into a rethink.
"It is a better set of sanctions than the earlier set, and it's specifically clearly designed in a smarter way to put countries that have high-risk vendors - specifically Huawei - under greater pressure.